As you know from past posts. I degoated with a 'H' bypass kit. Also installed coasters and the bike ran like clock. As of this past Saturday the bike has developped a popping/ backfire on closed throttle decelleration, some from the right but mostly from the left, didn't have that prior to this past Saturday. I checked the obvious and all seems ok. Took bike to the dealer, they sync and ajusted the carbs but they didn't roadtest it, the problem was still there after I roadtested it. They charged me $69.00 and didn't address my concern. They said that they will contact Kawasaki for advise. Does anyone here know what I should be looking for?